Laser welding device of automobile welding assembly line

Abstract

The invention relates to the technical field of welding devices, and particularly discloses a laser welding device of an automobile welding assembly line, which comprises a driving base, the bottom of the driving base is fixedly connected with a dispersing bracket, the bottom of the dispersing bracket is fixedly connected with a fixing device, and the side surface of the fixing device is fixedly connected with a welding sliding table; the welding sliding table is arranged at the position below the driving base, the side face of the hollow hydraulic rod communicates with a corrugated pipe, the end, away from the hollow hydraulic rod, of the corrugated pipe communicates with a main supporting rod, and the part, located on one side of the main supporting rod, of the top of the right movable plate is fixedly connected with a first elastic piece. The end, away from the right movable plate, of the first elastic piece is fixedly connected with the top of the left movable plate, the top of the main supporting rod is fixedly connected with the bottom of the dispersing support, and the top of the right movable plate is fixedly connected with the bottom of the welding sliding table. And the purposes of supporting and folding welding of the special-shaped parts are achieved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a laser welding device for an automotive welding line. Background Technology

[0002] In modern automobile manufacturing, welding is a core process for body-in-white forming and structural reinforcement. While traditional spot welding and arc welding technologies are mature, they are increasingly showing limitations in meeting the automotive industry's growing demands for lightweighting, high strength, high precision, and aesthetics. Quality risks exist, and the integration of subsystems such as lasers, light guide systems, welding heads, robots, and tooling fixtures from different suppliers is challenging and complex. Furthermore, maintenance work, including optical lens contamination and fiber optic loss, requires specialized expertise, impacting overall equipment effectiveness (OEE). High-power lasers and precision optical components require substantial initial investment, and the high technical skills required for process debugging and maintenance personnel limit their widespread adoption across a wider range of vehicle models due to their overall cost. Current research and development focus is on designing a highly flexible, intelligent, reliable, and easy-to-maintain laser welding device. An ideal device should be seamlessly integrated into an automated welding line. Through high-precision movement of robots or CNC axes, intelligent welding heads equipped with weld seam tracking and adaptive adjustment functions, an online monitoring system integrating multiple sensors, and modular and standardized design, it can ultimately achieve rapid switching of weld seams for different vehicle models, stable and reliable welding processes, and full traceability of production quality, thereby comprehensively improving the production efficiency, product quality, and manufacturing cost competitiveness of automotive welding lines.

[0003] According to patent number CN116038114B, a laser welding device for an automotive welding line is provided. The variable seam adjustment component can slide along the weld seam of the automotive welding plate and adjust the weld seam size accordingly. An intermediate welding device is provided in the middle of the lower end face of the main frame. However, this device lacks support measures for workpieces on different planes and is insufficient for irregularly shaped parts. Summary of the Invention

[0004] To solve the above technical problems, the present invention is achieved through the following technical solution: a laser welding device for an automotive welding line, comprising a drive base, a dispersion support fixedly connected to the bottom of the drive base, a fixing device fixedly connected to the bottom of the dispersion support, a welding slide fixedly connected to the side of the fixing device, and the welding slide being disposed below the drive base. The fixing device includes a right movable plate, a left movable plate rotatably connected to the side of the right movable plate via a rotating shaft, a fixed end of a hollow hydraulic rod fixedly connected to the top of the right movable plate, an air extraction connector connected to the top of the hollow hydraulic rod, a fixed plate fixedly connected to the movable end of the hollow hydraulic rod, a bellows connected to the side of the hollow hydraulic rod, a main support rod connected to the end of the bellows away from the hollow hydraulic rod, a first spring plate fixedly connected to the top of the right movable plate on the side of the main support rod, the end of the first spring plate away from the right movable plate fixedly connected to the top of the left movable plate, the top of the main support rod fixedly connected to the bottom of the distribution bracket, and the top of the right movable plate fixedly connected to the bottom of the welding slide.

[0005] Preferably, the fixed plate includes a fixed suction cup, the inner wall of which is fixedly connected to a positioning magnet, and the side of which is fixedly connected to an annular cover plate. A fixing groove is formed at the bottom of the annular cover plate, and a support ring is fixedly connected to the top of the annular cover plate. The top of the fixed suction cup communicates with the movable end of a hollow hydraulic rod. The drive base is fixed to the movable end of the robotic arm. When the robotic arm is started, it drives the drive base to move, which in turn moves the distributed support, which in turn moves the main support rod. The bottom of the main support rod guides and positions the workpiece, bringing the joints of different workpieces closer together for easier welding. Under the pressure of the workpiece, the main support rod is also moved... The strut is driven, which in turn drives the hydraulic oil inside the main support rod into the hollow hydraulic rod. This drives the movable end of the hollow hydraulic rod to move the fixed suction cup. After connecting the air extraction connector, the external air extraction device is activated to extract air from the inside of the hollow hydraulic rod. The negative pressure inside the hollow hydraulic rod causes the fixed suction cup to deform, thereby fixing the workpiece. The workpiece is further positioned by a positioning magnet, and the coverage area of ​​the fixed suction cup is increased by an annular cover plate. The adhesion of the fixed suction cup is increased by a fixing groove. The workpiece is stabilized under the negative air pressure, and the support ring prevents the workpiece from shifting during the extrusion process, thereby reducing welding errors.

[0006] Preferably, the main support rod includes a main hydraulic rod, a connecting frame is fixedly connected to the fixed end of the main hydraulic rod, a torsion plate is fixedly connected to the side of the fixed end of the main hydraulic rod, a second spring is fixedly connected to one side of the bottom of the torsion plate, a sliding shaft is fixedly connected to the bottom of the second spring, a limit slide is sleeved and slidably connected to the side of the sliding shaft, a support plate is fixedly connected to the movable end of the main hydraulic rod, the side of the limit slide is fixedly connected to the side of the right movable plate, one end of the bellows communicates with the side of the fixed end of the main hydraulic rod, and the top of the connecting frame is fixedly connected to the bottom of the distribution support.

[0007] Preferably, the support plate includes a left guide plate, and a right guide plate is fixedly connected to the side of the left guide plate. A guide groove is formed on the inner wall of the left guide plate. The top of the left guide plate is fixedly connected to the movable end of the main hydraulic rod. The movable end of the main hydraulic rod drives the left guide plate to move. The movement of the left guide plate guides the side of the workpiece, so that when two different flat workpieces are combined at a certain angle, they move along the guidance of the left and right guide plates, thereby bringing the weld seams of the two workpieces closer together. This lowers the weld seam between the workpieces, facilitating welding. The guide groove also facilitates the guidance of the workpiece's side, making it easier for the workpiece to... When the workpiece is brought close together and at a specific angle, the guiding action of the left and right guide plates reacts inside the main hydraulic rod. The main hydraulic rod is twisted by the guiding action of the left and right guide plates, which in turn drives the torsion plate to twist. The twisting of the torsion plate causes the second spring to deform, and the deformation of the second spring causes the sliding shaft to slide along the inside of the limiting slide, thereby limiting the rotation angle of the main hydraulic rod. The limitation of the sliding shaft by the limiting slide and the elasticity of the second spring keep the main hydraulic rod in a symmetrical position between the right and left movable plates, which facilitates the alignment of the welding slide with the weld seam between the workpieces, thus facilitating the welding and fixing of the two workpieces.

[0008] Preferably, the welding slide includes an electric slide. A power supply connector is fixedly connected to the bottom of the movable end of the electric slide. A laser head is fixedly connected to the bottom of the power supply connector. A rotating block is fixedly connected to the side of the fixed end of the electric slide. A third spring is sleeved and fixedly connected to the side of the rotating block. The bottom of the third spring is fixedly connected to the top of the right movable plate. After the weld seams between the workpieces approach each other, the electric slide is activated. The moving end of the electric slide moves, causing the power supply connector to move. Simultaneously, the power supply connector supplies power to the laser head and performs linear motion under the drive of the electric slide. The workpiece slides to weld linear welds. Guided by the right and left movable plates, the workpiece rotates. The reaction force of the workpiece causes the right movable plate to twist. The twisting of the right movable plate causes the third spring to deform and generate elastic force. The symmetrical arrangement of the third spring facilitates the rotation of the rotating block, which in turn drives the electric slide table to rotate and drives the laser head to weld the weld in a directional manner. This facilitates welding at the butt joint position of the workpieces, making it easier to connect different workpieces together. The electric slide table drives the laser head to slide linearly, which facilitates continuous welding at the welding machine position.

[0009] Preferably, the dispersing support includes a fixed shaft, a dispersing frame rotatably connected to the side of the fixed shaft, a return spring fixedly connected to the bottom of the dispersing frame, a friction ring fixedly connected to the side of the dispersing frame, a connecting seat rotatably connected to the side of the dispersing frame, the top of the fixed shaft fixedly connected to the bottom of the drive base, and the bottom of the connecting seat fixedly connected to the top of the connecting frame.

[0010] Preferably, the connecting seat includes a connecting base, a rotating seat is fixedly connected to the top of the connecting base, a rotating shaft is rotatably connected through and to the side of the rotating seat, a connecting plate is fixedly connected to the bottom of the connecting base, an arc-shaped groove is formed at the bottom of the connecting plate, the rotating shaft extends into the side of the dispersing frame and is rotatably connected to the dispersing frame, the side of the rotating seat contacts the side of the friction ring, the bottom of the connecting plate is fixedly connected to the top of the connecting frame, the driving base moves under the drive of the robotic arm, the movement of the driving base drives the fixed shaft to move, the movement of the fixed shaft drives the dispersing frame to rotate, and multiple sets of dispersing frames rebound under the elastic force of the return spring. The downward movement of the fixed shaft, transmitted through the dispersing frame, causes the connecting base to rotate along the side of the dispersing frame. The friction ring reduces the rotational speed between the dispersing frame and the connecting base, thus dispersing the supporting force of the dispersing frame and transferring it to the right movable plate. This facilitates the rotation of the right movable plate along the side of the workpiece, enabling the workpiece to be guided and positioned. The arc-shaped groove facilitates sliding fixation, allowing for quick installation and shape change. The rotational connection of the rotating seat enables the right movable plate to move towards the center, providing wrapping support for the two workpieces and facilitating their close-up support.

[0011] This invention provides a laser welding device for an automotive welding line. It has the following advantages: 1. The laser welding device of this automotive welding line is equipped with a main support rod. The drive base is fixed on the movable end of the robotic arm. When the robotic arm is started, it drives the drive base to move, which in turn moves the distribution bracket, which in turn moves the main support rod. The bottom of the main support rod guides and positions the workpiece, bringing the joints of different workpieces closer together to facilitate welding. Under the pressure of the workpiece, the main support rod is driven, which in turn drives the hydraulic oil inside the main support rod into the hollow hydraulic rod. This drives the movable end of the hollow hydraulic rod to move the fixed suction cup. After connecting the air extraction connector, the external air extraction device is activated to extract air from the inside of the hollow hydraulic rod. The negative pressure inside the hollow hydraulic rod causes the fixed suction cup to deform, thereby fixing the workpiece. The workpiece is further positioned by a positioning magnet, and the coverage area of ​​the fixed suction cup is increased by an annular cover plate, while the adhesion of the fixed suction cup is increased by a fixing groove. The workpiece is stabilized under the negative air pressure, and the support ring prevents the workpiece from shifting during the extrusion process, thereby reducing welding errors.

[0012] 2. The laser welding device in this automotive welding line is equipped with a left guide plate. The movable end of the main hydraulic rod drives the left guide plate to move. The movement of the left guide plate guides the side of the workpiece, so that when two different flat workpieces are combined at a certain angle, they move along the left and right guide plates, thereby bringing the weld seam of the two workpieces closer together. This lowers the weld seam between the workpieces, facilitating welding. The guide groove facilitates the side guidance of the workpieces, making it easier for the workpieces to move closer together. Furthermore, when the workpieces are at a specific angle, the left and right guide plates... The guiding action reacts inside the main hydraulic rod, which is guided by the left and right guide plates to twist. This twisting action drives the torsion plate to twist, which in turn causes the second spring to deform. The deformation of the second spring causes the sliding shaft to slide along the inside of the limiting slide, thus limiting the rotation angle of the main hydraulic rod. The limitation of the sliding shaft by the limiting slide and the elasticity of the second spring keep the main hydraulic rod in a symmetrical position between the right and left movable plates. This facilitates the alignment of the welding slide with the weld seam between the workpieces, making it easier to weld and fix the two workpieces together.

[0013] 3. The laser welding device in this automotive welding line is equipped with a laser head. When the weld seams between workpieces approach each other, the electric slide is activated. The moving end of the electric slide moves, causing the power supply connector to move. The power supply connector supplies power to the laser head and slides linearly under the drive of the electric slide, thereby welding the linear weld seam. The workpiece rotates under the guidance of the right and left movable plates. The reaction force of the workpiece causes the right movable plate to twist. The twisting of the right movable plate causes the third spring to deform and generate elastic force. The symmetrical arrangement of the third spring facilitates the rotation of the rotating block, thereby driving the electric slide to rotate and causing the laser head to weld the weld seam in a directional manner. This facilitates welding at the butt joint position of the workpieces, making it easier to connect different workpieces together. The linear sliding of the laser head driven by the electric slide facilitates continuous welding at the welding machine position.

[0014] 4. The laser welding device of this automotive welding line is equipped with a fixed shaft. The drive base moves under the drive of the robotic arm. The movement of the drive base drives the fixed shaft to move, and the movement of the fixed shaft drives the dispersion frame to rotate. Multiple sets of dispersion frames rebound under the elastic force of the return springs, and transmit the descent of the fixed shaft through the dispersion frames. The descent of the fixed shaft drives the connecting base to rotate along the side of the dispersion frame. The friction ring reduces the rotational speed between the dispersion frame and the connecting base, thereby facilitating the dispersion of the support force of the dispersion frame and transmitting the support force of the dispersion frame to one side of the right movable plate. This facilitates the rotation of the right movable plate along the side of the workpiece, thus facilitating the guidance and positioning of the workpiece. The arc-shaped slide groove facilitates sliding fixation, thereby facilitating quick installation and changeover. The rotational connection of the rotating seat enables the right movable plate to move towards the center, thereby facilitating the wrapping support of the two workpieces and facilitating the close support of the workpieces. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the laser welding device structure for the automotive welding line of the present invention; Figure 2 This is a schematic diagram of the fixing device structure of the present invention; Figure 3 This is a schematic diagram of the fixed disk structure of the present invention; Figure 4 This is a schematic diagram of the main support rod structure of the present invention; Figure 5 This is a schematic diagram of the support plate structure of the present invention; Figure 6 This is a schematic diagram of the welding slide structure of the present invention; Figure 7 This is a schematic diagram of the distributed support structure of the present invention; Figure 8 This is a schematic diagram of the connector structure of the present invention.

[0016] In the diagram: 1. Drive base; 2. Distributed support; 3. Welding slide; 4. Fixing device; 401. Right movable plate; 402. Left movable plate; 403. Hollow hydraulic rod; 404. Air extraction connector; 405. Fixing plate; 406. Bellows; 407. Main support rod; 408. First spring; 4051. Fixing suction cup; 4052. Positioning magnet; 4053. Annular cover plate; 4054. Fixing groove; 4055. Support ring; 4071. Main hydraulic rod; 4072. Connecting frame; 4073. Torsion plate; 4074. Second spring; 4 075, Sliding shaft; 4076, Limiting slide; 4077, Support plate; 40771, Left guide plate; 40772, Right guide plate; 40773, Guide groove; 301, Electric slide table; 302, Power supply connector; 303, Laser head; 304, Rotating block; 305, Third spring; 201, Fixed shaft; 202, Dispersing frame; 203, Return spring; 204, Friction ring; 205, Connecting seat; 2051, Connecting base; 2052, Rotating seat; 2053, Rotating shaft; 2054, Connecting plate; 2055, Arc-shaped slide groove. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] For the first embodiment, please refer to... Figures 1-3 The present invention provides a technical solution: a laser welding device for an automotive welding line, comprising a drive base 1, a dispersion support 2 fixedly connected to the bottom of the drive base 1, a fixing device 4 fixedly connected to the bottom of the dispersion support 2, a welding slide 3 fixedly connected to the side of the fixing device 4, and the welding slide 3 being disposed below the drive base 1. The fixing device 4 includes a right movable plate 401. A left movable plate 402 is rotatably connected to the side of the right movable plate 401 via a rotating shaft. The fixed end of a hollow hydraulic rod 403 is fixedly connected to the top of the right movable plate 401. An air extraction connector 404 is connected to the top of the hollow hydraulic rod 403. A fixed plate 405 is fixedly connected to the movable end of the hollow hydraulic rod 403. A bellows 406 is connected to the side of the hollow hydraulic rod 403. A main support rod 407 is connected to the end of the bellows 406 away from the hollow hydraulic rod 403. A first spring piece 408 is fixedly connected to the top of the right movable plate 401 located on one side of the main support rod 407. The end of the first spring piece 408 away from the right movable plate 401 is fixedly connected to the top of the left movable plate 402. The top of the main support rod 407 is fixedly connected to the bottom of the dispersion bracket 2. The top of the right movable plate 401 is fixedly connected to the bottom of the welding slide 3.

[0019] The fixed plate 405 includes a fixed suction cup 4051, a positioning magnet 4052 fixedly connected to the inner wall of the fixed suction cup 4051, an annular cover plate 4053 fixedly connected to the side of the fixed suction cup 4051, a fixing groove 4054 is opened at the bottom of the annular cover plate 4053, a support ring 4055 is fixedly connected to the top of the annular cover plate 4053, and the top of the fixed suction cup 4051 is connected to the movable end of the hollow hydraulic rod 403.

[0020] The drive base 1 is fixed to the movable end of the robotic arm. When the robotic arm is started, it moves the drive base 1, which in turn moves the distribution support 2. The distribution support 2 then moves the main support rod 407. The bottom of the main support rod 407 guides and positions the workpiece, bringing the joints of different workpieces closer together for easier welding. Under the pressure of the workpiece, the main support rod 407 is driven, causing the hydraulic oil inside the main support rod 407 to enter the hollow hydraulic rod 403. This drives the movable end of the hollow hydraulic rod 403 to move the fixed suction cup 4051. After moving and connecting the air extraction connector 404, the external air extraction device is activated to extract air from the inside of the hollow hydraulic rod 403. The negative pressure generated inside the hollow hydraulic rod 403 causes the fixed suction cup 4051 to deform, thereby fixing the workpiece. The positioning magnet 4052 assists in the positioning of the workpiece, and the annular cover plate 4053 increases the coverage area of ​​the fixed suction cup 4051. The fixing groove 4054 increases the adhesion of the fixed suction cup 4051. The workpiece is stabilized under the negative pressure of the air, and the support ring 4055 prevents the workpiece from shifting during the extrusion process, thereby reducing the welding error of the workpiece.

[0021] For the second embodiment, please refer to... Figures 1-5Based on the first embodiment, the present invention provides a technical solution: the main support rod 407 includes a main hydraulic rod 4071, a connecting frame 4072 is fixedly connected to the fixed end of the main hydraulic rod 4071, a torsion plate 4073 is fixedly connected to the side of the fixed end of the main hydraulic rod 4071, a second spring plate 4074 is fixedly connected to the bottom side of the torsion plate 4073, a sliding shaft 4075 is fixedly connected to the bottom of the second spring plate 4074, a limiting slide 4076 is sleeved and slidably connected to the side of the sliding shaft 4075, a support plate 4077 is fixedly connected to the movable end of the main hydraulic rod 4071, the side of the limiting slide 4076 is fixedly connected to the side of the right movable plate 401, one end of the bellows 406 communicates with the side of the fixed end of the main hydraulic rod 4071, and the top of the connecting frame 4072 is fixedly connected to the bottom of the dispersion support 2.

[0022] The support plate 4077 includes a left guide plate 40771, a right guide plate 40772 is fixedly connected to the side of the left guide plate 40771, a guide groove 40773 is opened on the inner side of the left guide plate 40771, and the top of the left guide plate 40771 is fixedly connected to the movable end of the main hydraulic rod 4071.

[0023] The movable end of the main hydraulic rod 4071 drives the left guide plate 40771 to move. The movement of the left guide plate 40771 guides the side of the workpiece, so that when two different flat workpieces are combined at a certain angle, they move along the guide of the left guide plate 40771 and the right guide plate 40772, thereby bringing the weld seam of the two workpieces closer together and lowering the weld seam between the workpieces, thus facilitating welding. The guide groove 40773 facilitates the guidance of the side of the workpiece, making it easier for the workpieces to move closer together. When the workpiece is at a specific angle, the guiding action of the left guide plate 40771 and the right guide plate 40772 reacts inside the main hydraulic rod 4071, and the main hydraulic rod 4071 is subjected to... The left guide plate 40771 and the right guide plate 40772 guide the main hydraulic rod 4071 to rotate, thereby driving the torsion plate 4073 to rotate. The torsion plate 4073 rotates, causing the second spring 4074 to deform. The deformation of the second spring 4074 causes the sliding shaft 4075 to slide along the inside of the limiting slide 4076, thereby limiting the rotation angle of the main hydraulic rod 4071. The limitation of the sliding shaft 4075 by the limiting slide 4076 and the elasticity of the second spring 4074 keep the main hydraulic rod 4071 in a symmetrical position between the right movable plate 401 and the left movable plate 402, which facilitates the alignment of the welding slide 3 with the weld seam between the workpieces, thus facilitating the welding and fixing of the two workpieces.

[0024] Third embodiment, please refer to Figures 1-6Based on the second embodiment, the present invention provides a technical solution: the welding slide 3 includes an electric slide 301, a power supply connector 302 is fixedly connected to the bottom of the movable end of the electric slide 301, a laser head 303 is fixedly connected to the bottom of the power supply connector 302, a rotating block 304 is fixedly connected to the side of the fixed end of the electric slide 301, a third spring piece 305 is sleeved and fixedly connected to the side of the rotating block 304, and the bottom of the third spring piece 305 is fixedly connected to the top of the right movable plate 401.

[0025] After the weld seams between the workpieces approach each other, the electric slide table 301 is activated. The moving end of the electric slide table 301 moves, driving the power supply connector 302 to move. The power supply connector 302 supplies power to the laser head 303 while sliding linearly under the drive of the electric slide table 301, thereby welding the linear weld seam. The workpiece rotates under the guidance of the right movable plate 401 and the left movable plate 402. The reaction force of the workpiece drives the right movable plate 401 to twist. The twisting of the right movable plate 401 causes the third spring plate 305 to deform and generate elastic force. The symmetrical arrangement of the third spring plate 305 facilitates the rotation of the rotating block 304, thereby driving the electric slide table 301 to rotate and driving the laser head 303 to weld the weld seam in a directional manner. This facilitates welding at the butt joint position of the workpieces, making it easier to connect different workpieces together. The electric slide table 301 drives the laser head 303 to slide linearly, thereby facilitating continuous welding at the welding machine position.

[0026] For the fourth embodiment, please refer to [link / reference]. Figures 1-8 Based on the third embodiment, the present invention provides a technical solution: the dispersion support 2 includes a fixed shaft 201, a dispersion frame 202 is rotatably connected to the side of the fixed shaft 201, a return spring 203 is fixedly connected to the bottom of the dispersion frame 202, a friction ring 204 is fixedly connected to the side of the dispersion frame 202, a connecting seat 205 is rotatably connected to the side of the dispersion frame 202, the top of the fixed shaft 201 is fixedly connected to the bottom of the drive base 1, and the bottom of the connecting seat 205 is fixedly connected to the top of the connecting frame 4072.

[0027] The connecting seat 205 includes a connecting base 2051, a rotating seat 2052 fixedly connected to the top of the connecting base 2051, a rotating shaft 2053 rotatably connected through and to the side of the rotating seat 2052, a connecting plate 2054 fixedly connected to the bottom of the connecting base 2051, an arc-shaped groove 2055 opened at the bottom of the connecting plate 2054, the rotating shaft 2053 extends into the side of the dispersing frame 202 and is rotatably connected to the dispersing frame 202, the side of the rotating seat 2052 contacts the side of the friction ring 204, and the bottom of the connecting plate 2054 is fixedly connected to the top of the connecting frame 4072.

[0028] Driven by the robotic arm, the drive base 1 moves, causing the fixed shaft 201 to move. The fixed shaft 201 then rotates the dispersing frame 202. Multiple sets of dispersing frames 202 rebound under the elastic force of the return spring 203, transmitting the descent of the fixed shaft 201 through the dispersing frame 202. The descent of the fixed shaft 201 causes the connecting base 2051 to rotate along the side of the dispersing frame 202. The friction ring 204 reduces the rotational speed between the dispersing frame 202 and the connecting base 2051. The distribution of the supporting force of the distribution frame 202 is facilitated and the supporting force of the distribution frame 202 is transmitted to one side of the right movable plate 401, thereby facilitating the rotation of the right movable plate 401 along the side of the workpiece, thus facilitating the guidance and positioning of the workpiece. The arc-shaped slide groove 2055 facilitates sliding fixation, thereby facilitating quick installation and changeover. The rotation connection of the rotating seat 2052 enables the right movable plate 401 to move towards the center, thereby facilitating the wrapping support of the two workpieces and facilitating the close support of the workpieces.

[0029] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A laser welding device for a vehicle welding line, characterized by: Including drive base (1), the bottom of drive base (1) is fixedly connected with dispersion support (2), the bottom of dispersion support (2) is fixedly connected with fixing device (4), the side of fixing device (4) is fixedly connected with welding sliding table (3), and welding sliding table (3) is arranged at the position below drive base (1); The fixing device (4) includes a right movable plate (401), a left movable plate (402) is rotatably connected to the side of the right movable plate (401) by a rotating shaft, a hollow hydraulic rod (403) is fixedly connected to the top of the right movable plate (401), an air extraction joint (404) is communicated with the top of the hollow hydraulic rod (403), a fixed disc (405) is fixedly connected to the movable end of the hollow hydraulic rod (403), a bellows (406) is communicated with the side of the hollow hydraulic rod (403), a main support rod (407) is communicated with the end of the bellows (406) away from the hollow hydraulic rod (403), a first elastic sheet (408) is fixedly connected to the part of the top of the right movable plate (401) on one side of the main support rod (407), the end of the first elastic sheet (408) away from the right movable plate (401) is fixedly connected to the top of the left movable plate (402), the top of the main support rod (407) is fixedly connected to the bottom of the dispersion support (2), and the top of the right movable plate (401) is fixedly connected to the bottom of the welding sliding table (3).

2. The laser welding device of an automobile welding line according to claim 1, characterized in that: The fixed disc (405) includes a fixed suction disc (4051), a positioning magnet (4052) is fixedly connected to the inner wall of the fixed suction disc (4051), an annular cover plate (4053) is fixedly connected to the side of the fixed suction disc (4051), a fixed groove (4054) is formed in the bottom of the annular cover plate (4053), a support ring (4055) is fixedly connected to the top of the annular cover plate (4053), and the top of the fixed suction disc (4051) is communicated with the movable end of the hollow hydraulic rod (403).

3. The laser welding device of claim 1, wherein: The main support rod (407) includes a main hydraulic rod (4071), a connecting frame (4072) is fixedly connected to the fixed end of the main hydraulic rod (4071), a twisting plate (4073) is fixedly connected to the fixed end side of the main hydraulic rod (4071), a second elastic sheet (4074) is fixedly connected to one side of the bottom of the twisting plate (4073), a sliding shaft (4075) is fixedly connected to the bottom of the second elastic sheet (4074), the sliding shaft (4075) is sleeved and slidably connected with a limiting sliding seat (4076), a support plate (4077) is fixedly connected to the movable end of the main hydraulic rod (4071), the side of the limiting sliding seat (4076) is fixedly connected with the side of the right movable plate (401), one end of the bellows (406) is communicated with the fixed end side of the main hydraulic rod (4071), and the top of the connecting frame (4072) is fixedly connected with the bottom of the dispersion support (2).

4. The laser welding device of an automobile welding line according to claim 3, characterized in that: The support plate (4077) includes a left guide plate (40771), the side of the left guide plate (40771) is fixedly connected with a right guide plate (40772), the inner wall side of the left guide plate (40771) is provided with a guide groove (40773), and the top of the left guide plate (40771) is fixedly connected with the movable end of the main hydraulic rod (4071).

5. The laser welding device of an automobile welding line according to claim 1, characterized in that: The welding sliding table (3) includes an electric sliding table (301), the bottom of the movable end of the electric sliding table (301) is fixedly connected with an energy supply joint (302), the bottom of the energy supply joint (302) is fixedly connected with a laser head (303), the side of the fixed end of the electric sliding table (301) is fixedly connected with a rotating block (304), the side of the rotating block (304) is sleeved and fixedly connected with a third elastic sheet (305), and the bottom of the third elastic sheet (305) is fixedly connected with the top of the right movable plate (401).

6. The laser welding device of an automobile welding line according to claim 3, characterized in that: The dispersion support (2) includes a fixed shaft (201), the side of the fixed shaft (201) is rotatably connected with a dispersion frame (202), the bottom of the dispersion frame (202) is fixedly connected with a return elastic sheet (203), the side of the dispersion frame (202) is fixedly connected with a friction ring (204), and the side of the dispersion frame (202) is rotatably connected with a connecting seat (205).

7. The laser welding device of an automobile welding line according to claim 6, characterized in that: The top of the fixed shaft (201) is fixedly connected with the bottom of the driving base (1), and the bottom of the connecting seat (205) is fixedly connected with the top of the connecting frame (4072).

8. The laser welding device of claim 6, wherein: The connecting seat (205) includes a connecting base (2051), the top of the connecting base (2051) is fixedly connected with a rotating seat (2052), the side of the rotating seat (2052) is rotatably connected with a rotating shaft (2053), the bottom of the connecting base (2051) is fixedly connected with a connecting plate (2054), and the bottom of the connecting plate (2054) is provided with an arc-shaped sliding groove (2055).

9. The laser welding device of an automobile welding line according to claim 8, characterized in that: The rotating shaft (2053) extends into the side of the dispersion frame (202) and is rotatably connected with the dispersion frame (202), the side of the rotating seat (2052) is in contact with the side of the friction ring (204), and the bottom of the connecting plate (2054) is fixedly connected with the top of the connecting frame (4072).

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